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Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions

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Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions

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dc.contributor.author	Sánchez Ramírez, Javier Eduardo
dc.contributor.author	Pastor, Laura
dc.contributor.author	Martí Ortega, Nuria
dc.contributor.author	Claros, J.
dc.contributor.author	Doñate, S.
dc.contributor.author	Bouzas Blanco, Alberto
dc.date.accessioned	2019-11-13T08:53:24Z
dc.date.available	2020-10-29T05:45:05Z
dc.date.issued	2019
dc.identifier.citation	Sánchez Ramírez, Javier Eduardo Pastor, Laura Martí Ortega, Nuria Claros, J. Doñate, S. Bouzas Blanco, Alberto 2019 Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions Environmental Technology
dc.identifier.uri	https://hdl.handle.net/10550/72181
dc.description.abstract	This study compares the operation of mesophilic and thermophilic anaerobic digestion of sewage sludge and their effects in uncontrolled phosphorus precipitation. The research has been carried out using a pilot plant consisting of two digesters of 1.6 m3 working volume, treating the mixed sludge of Alzira WWTP (Valencia, Spain). The digesters were operated in parallel, at different conditions: mesophilic (38 ± 2.0°C) and thermophilic (55 ± 2.5°C) temperatures and organic loading rates (OLR) ranging from 1.1 to 1.7 kg volatile solids (VS) m−3 d−1 and different hydraulic retention times (HRT) 20, 15 and 12 days. Uncontrolled precipitation was evaluated through P, Mg and Ca mass balances in both digesters. The results revealed that up to 82% of the available P and 81% of the available Mg precipitated in the mesophilic digester at HRT = 20 days which suggests the possible formation of struvite in both digesters. At lower HRT (HRT = 12 days) Mg and Ca precipitation was negligible and P fixation has been attributed to the possible formation of iron phosphates or adsorption processes on solid surfaces.
dc.language.iso	eng
dc.relation.ispartof	Environmental Technology, 2019
dc.subject	Aigües residuals Plantes de tractament
dc.subject	Aigua Qualitat
dc.title	Analysis of uncontrolled phosphorus precipitation in anaerobic digesters under thermophilic and mesophilic conditions
dc.type	journal article	es_ES
dc.date.updated	2019-11-13T08:53:24Z
dc.identifier.doi	10.1080/09593330.2019.1681522
dc.identifier.idgrec	135026
dc.accrualmethod
dc.embargo.terms	1 year
dc.rights.accessRights	open access	es_ES